Plastic-molding machine.



N0. 829,712. PATENTED AUG. 28, 1906. W. S. GODWIN & O. I. WILLIAMS.

PLASTIC MOLDING MACHINE.

APPLICATION FILED FEB.2. 1905.

5 SHEETS-SHEET 1.

WITNESSES ATTORN EYS ml nomzls Penn's 20.. wisumawrv, n, c

No. 829,712. PATENTED AUG. 28, 1906. W. s. GODWIN & 0. I. WILLIAMS.

PLASTIC MOLDING MACHINE.

APPLICATION FILED mum. 1905.

' wil WW I I WI 1 w WITNESSES INVENTOR$ JMa/ 'fii mm BY H M ATTORNEYS 5 SHEE S-SHEET 2- No- 829,712. PATENTED AUG. 28,1906.

W. s. GODWIN & 0, I. WILLIAMS. PLASTIC MOLDING MACHINE.

APPLICATION FILED FEB. 2. 1905.

6 SHEETS-SHEET 3.

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W. s. GODWIN & c. I. WILLIAMS. PLASTIC MOLDING MACHINE.

APPLICATION FILED FEB-2. 1905.

PATENTED.AUG.28,1906

5 SHEETS-SHEET 4.

MM WMWWWWLM ATTORNEYS THE noun]: PETERS co., vasmucmn. uv c.

No- 829,712. PATENTED AUG. 28, 1906. W. S. GODWIN & G. WILLIAMS.

PLASTIC MOLDING MACHINE.

APPLIOATION FILED F1112. 1905- 5 SHEETS-SHEET 5;

INVENTQRS 4 6 LL. J Mm WITNESSES fiww;% Wm M ATTOR N EYS known-asatdup ex' p t ejector,

PATENT OFFICE.

WHMAM S. :GODWIN, OF NEW YORK, AND CHARLES I. WILLIAMS, OF

UTlCAy N EW YORK.

PLASTIC-MOLDING MAQ-HINE.

Application filed ,Iebrnary Specification of Letters Patent.

Patented Aug. 28, mos.

2,1905. Serial No. 243,792.

To all when it may concern:

Be .it known that we, WILLIAM ,-S..GODW;IN, ailie ident. of the 'boroug-hof Brooklyn, cit yof New Kerk, county of Kings, State of New York, andOHAnL'Es I. WILLIAMS, a resident ofitheicityof Utica, county-ofOneida, State of ,New ork, .citizens of the United States of America, have invented Improvements in Plastic Molding-Machines, of which the following is ;a specification.

invention relates tothatcl ass ofmoldingsmachines such asshown in United States RatentNQ. 783,516, ClatedFebruaryQS, 1905, which machines are particularly adaptedior compressing plastic material into blocks.

The tobfject of this invention is toim prove the constructionof such machines so asto secure abetter, .surer, and .steadier feed of some of .the ,prineipaloperating parts of the machine, particularly the revoluble mold-table and. compressiomplungers yto. obtain abetter lubrication ofsaidplungers; to secure a more rapid andsimple ejection ofthepressed blocks from ;-the molds to the conveyor which reeeives them, and to improve other constructional features, as set forth hereinafter.

ln-theaccompanying drawings, Figure 1 is aplan view, partly brokenawaymtour impro sed machine. Fig. 2 is a vertical. central se tionon h i n 2 2,. ig. 1,, also wit ipa brokenaway. Fig. ,3 is a plan view of the mold tahle andits operatingmechanism, the compression -,plu ngers, feed hoppers. and ejec or me hanism removed, pa Of h t hlebeingibroken awayitobetter illustrate the interiorconstruction. Fig. 4 is a sectional view through the center ot'ithree moldsin the mQlQl-ntflblfi or platform and shows .them opfilling hopper, and com- IJ L ,SiQD-plilngers. ,Eig. 5 is a-vertieal section gfzthemoldtable and frame, shQWing the ear m chani m fo .r ta ing "th l t is z s e tlQll il Qtai of the lubricatingarrn ;;and E g. 7 is a sectional view ontheline .1 fits-16 a dF g sa deta of. the drumspaw d s ees eg l ver- ;iT he machin o th s inv ntion i wha i hm hin fth t 11 whi h tw0rm i d -nr le hth m ial, w ime d und go comp e s n ct n, and :two :m lds have .the compressed blocks ejected from them simultaneously. .Hence he lfiHiQihQPPQ :11 JH, tw c mpr ingcylindersC C, and two .ejectors E E are provided and are preferably located around a common axis, all mounted in suitable ,iraming straddling the circular mold-table 'l\ This mold-table rotates on circularly-arranged tracks 15 t on the framing .or base 1* of the machine. The table M, in viewof the duplex arrangement must be caused to take an intermittent ,revolving motion about its axis, eachmold stop.- ping successively beneath a fillingl opper, between compressing-plungers, and belowan ejectorofeach duplex set onceinacomplete revolution of the table. To secure this intermittent revolving motion, We mount in suitable bearings a .the side of the frame .1 a suitable cam-wheel C, Fig. 5,1havinga camgroove 0,. in which is guided a roller .7", mounted on a lever-arm. a, at one endpivoted to the frameat a andat the other .end to a horizontal connectingwrod ,1}, through a stud a The free end o'f theconnectingaod R is attached to one armof aduplen' latohmechanism whichrotates.aroundastud 3.0. the

axis Off/116 machine.

A centrall -located pivoted arm. 60, ,Fig.;?) is provided with latches 61 .at opposite ends, connected link 64, so that onewillvfollowthe movement of the other. Below one of the latchesfiln bell-crank lever 65 is ,pivoted ,to the frame (see Fig. 8) in such a position that thelever 65isadapted to throw saidlatchout of engagement .withthe notched inner, circumference of thetable M after the latter has been moved into a correetpositio'n, sothat then the rod R, previously describechcan ,returnthe armfitlinto aposition toengage the tableata different and followingpoint. A camprojection 68 on the camll} to'be hereinafter described, operates said bell-crank leverfifi a-t stated andproperintervals throughthe medium of the lever 67 androd ofi, Fig.6. The can1groove c in the cam-wheel Cflissoshaped that the r l will be actuated .atfirstSlOW y, tostartthe table Mlfiom its=position of rest with, one mold under its hopner accelerated initsmotion while travelingtowarrl,itsnext position, between the comPression-plungers; but just before reaching these ,plungers ,its speed is slackeneduntil it is alm'ost nilwhen nearly. in a in with. h p unee hrem i ins a a sol te 'fis filll fllg P od i i hih hereinbeiore referredto,

by links 62 .63 to a. short pivoting the plungers enter the mold, compress the material therein, and withdraw therefrom. Motion is imparted to the cam by the main shaft 1 and driving-pulley 2. In order to aid the cam toward the end of the rods stroke in stopping the table, which is heavy, and therefore has great inertia, we may bolt a spring and hydraulic stop-cylinder (see Fig. 3) to the frame of the machine, in which case we fastento'the periphery of the table M, at equal distances apart, blocks 4, projecting slightly beyond the periphery of the table.

The hydraulic cylinder 3 has a barrel-piston 5 of substantial length located within the cylinder, having an opening at one end throughv which a tapered rod 6, secured to the cylinder-head, may pass, so fitting the opening in the piston when the piston is in one position as to practically stopper the hole, such stoppering being gradually effected through the entire stroke of the piston by reason of the taper of the rod. Within the barrel-piston 5 there is located a strong spring 7, tending always to return the piston in a direction tangential to and against the direction of mo tion of the mold-table M.' A collar 8, secured to the piston, has a bent lever 9pivoted to it at 9, which lever and collar are 7 free to slide in an opening in .the wall of the cylinder 3 midway between its ends. A lever 10, pivoted to the frame F at 10, has one extremity located between the cylinder 3 and the short end of the lever 9, while its other end is located adjacent to the cam C, which carries on its face a projection 11, adapted to act against this lever-arm. As the moldtable is nearing the end of a partial rotation referred to before, a block 4 abuts upon they end of the bent lever 9, striking it, causing it to displace the piston 5 in a direction tangential to and in the direction of motion of the table M. Thiscauses the water behind the. piston to be displaced through the opening stoppered by the rod 6, the stoppering, as before stated, increasing as the piston moves farther in until altogether when the motion of the table has been correctly arrested by the cam-groove c and an auxiliary mold-table-locking means to be hereinafter de scribed. Before the table is again moved a step in its rotation, the cam 1 1 comes around, abuts upon the end of the lever 10 and causes its'shorter end to throw the lever 9 to release said lever of the block 4 on the mold-table. The spring 7 will obviously now return the barrel-piston to the other end of the cylinder.

The auxiliary locking mechanism heretotofore referred to consists of a cam-shaft 12, rotated by elliptical gears 13 14, gear 13 being fast on its shaft 12 and connected thereto by an ordinary construction of safety breakpin 15, while gear 14 is mounted upon a parallel shaft 16 and connected with the main shaft 1 through beveled gears 17 18. On the shaft-12 a segmental locking-arm 20and two cams 21 22 are secured. Bearings 23, se-

cured to the frame F, are provided for the I in a position with its lower edge above and 1 adjacent to a recess 24. It is in this position that the elliptical gears give to the cam-shaft- 12 its greatest speed, causing the segmental arm 20 to rapidly enter the recess 24 and aid table, thus serving to positively lock the table against any further movement until the segmental arm shall have been removed from the recess.

sion or ejecting plungers. For this purpose two rods 25 26 are connected from the valvecasing V through bell-crank levers 27 28, having rollers at their lower ends adapted to rest upon and be actuated by the cams 21 22. Should the table through some error not correctly place the molds in line with the plun-' gers, the segmental arm 20 obviously will not enter the recess 24, but instead will abut against the solid material of the table and be stopped, thus preventing further rotation of the cam-shaft 12 and preventing any opera tion of the valve by the cams 21 and 22. is because of this possible stoppage of the cam-shaft 12 that we locate the breakingpin 15 between the cam-shaft 12 and gear 13.-

Heretofore the ejectors E in this type of with the compression-plungers by means of a single central hydraulic cylinder, piston, and

iston-rod, to which the ends of the ejector-' lhvers have been fastened, said hydraulic cyl-' inder being used as a means for withdrawing the ejector and compression plungers from the molds. -We have found that such con struction does not allow uniform compression of theblocks in oppositely-located compression positions. Therefore in this machine we have located near the central axis of the machine two cylinders 31 31, each having a separate piston 32 and piston-rod 33, each piston-rod connected by a rod 34 with one end of the lever 30 of the ejectors, while each large hydraulic compression-cylinder C has the frame or head 35, Fig, 1, of its-piston connected to a piston-rod 33 by a lever 36, piv- .oted at 37, said lever 36 beingconnected by a' rod 38 with the piston-rod. A pipe 39' from the tank or other permanent source of hy- .draulic pressure communicates by a Y connection with the top of each of these cylin+ in correcting the proper position of the mold-- 5 The hydraulic operating valveV is pro-- vided with inlet and exhaust passages 'to the compression-cylinders O and must be actu-.

ated before the movement of the compres machine have been operatively connected IIO . e ector.

d'ers 31. As a consequence of this location and arrangement of parts, should one compression-plunger work slightly in advance of its mate, or should the bearings between the ejector-rod and compression-cylinder become worn, there will always be the same back pressure in each cylinder 31 to act against its connected compressing-cylii'uler. It will be understood that the valve V when in position to admit water to the compression-plunger cylinder forces the compressionplungers together with a force equal to the pressure area thereof less the area of one of the pistons 32-, and that when the exhaust-port of the valve V is opened the pressure within the cylinders 31 acts to return the compressionplungcrs to their position without the mold, as is described in the prior patent referred to.

A portion of the framing F is 'inclosed to form a tank, as shown in dotted lines, Fig. 3, and is provided with numerous supporting and strengthening webs w, Figs. 2 and. 4. In the bottom of the tank an endless belt or conveyer T is located, passing over a sprocket 3 within the tank and passing out of the tank through a box B. The tank within the base or frame F extends through and up near to the .top line of the bed-plate which carries the tracks 15 t. Through this chamber the trav eling table or conveyer-belt T is located in line with ejeetor-plungers E and in line with a large trough-like box B, before referred to. We provide a free and unobstructed passage between the lower edge of the mold which is beneath the ejector-plungers and the top of the traveling conveyer T, which conveyer we cover with a considerable depth of water, so that each block as it is forced out of its mold by the ejector-plunger is dropped into the water and sinks at a comparatively slow speed, bringing up against and resting on the traveling conveyer T, by which it is removed from the tank into the box B, from which it may be removed by mechanical means or by hand.

The platform T may have plates T depending from and adjacent to an opening for the passage of a block from the ejector reach ing down toward the top of the conveyer. (See Fig. 4.) Their purpose is to prevent the scattering of loose material into the tank when a mold which has not been properly filled, and hence the contained material not properly compressed, comes beneath the Such loosely-compressed material will often separate and fly out into the tank. It is our desire to pile such loose material up on the conveyer, traverse it outside of the machine, and do away with the otherwise necessary draining and cleaning of the tank. Care must be taken to so proportion these plates as not to interfere with the unobstructed fall of a properly-pressed block into the water-cushion and from thence onto the belt.

In order that the faces of the compressionplungers P P may be kept well lubricated to prevent the material which is being pressed from sticking to them when compressed in the mol s, we locate immediately beneath the revolving mold table M a circular or annular stationary platform T, having its upper face adjacent to and resting against the bottom edge of the molds. (See Figs. 3, 4, and 5.) This platform is so proportioned that its outer and inner circumferences are free of the frame of the machine, so as to allow any particles of material which may be dropped upon it to be brushed aside and fall therefrom. The circular platform T is preferably made of a number of different segments, such segments as come beneath the ejector-plunger and between the compression-plunger being cut away to fit said plungers, while the segment which comes beneath the hopper is not so cut away. Between the hopper and ejector-plunger we locate a lubricating-box 0, an opening in the platform to fit the top of the box being provided. To the under side of the traveling mold-table M, near each mold, we mount a scraper 40, consisting of a loosely-swinging plate pivoted to the under side of the table M. A freely-suspended felted roller 41 is also attached to the under side of the table as to fall into the lubricating-box O as it is rotated across and above it. The radial edges of the opening in the platform T in line with the compressionplungers are preferably formed with a slight incline, so that the scraper 40 and roller 41 will fall into the opening and bear against the entire surface of the lower compressionlunger P, the scraper to remove any partic es of material collected thereon and the lubricating-roller to lubricate the top surface of the lower plunger. It will be obvious that the roller 41 not only lubricates this lower plunger-surface, but in reality lubricates the entire upper surface of the platform T, thus passing over a saturated path from the time it emerges from the lubricating-box O to the time it passes over the face of the plunger P. We line. it essential to locate this lubricatingbox between the ejector-plunger and the feedhopper H, for were it located anywhere else the loose material within a mold as said mold passed over the lubricatin -box would fall into the box and soon clog t e same.

The continuous circular stationary platform T is supported within the frame by set screws 44, passing through horizontal strengthening-webs 45 and abutting against the under side of the platform T at their inner ends, Figs. 4 and 5, while screws 46, passing through the side of the frame, engage in sockets 47, attched to the outer circumference of the platform to move the platform into adjusted positions toward or away from the common axis.

To lubricate the surface of the compressionto and fro it will wipe the upstanding felted material against the face of the plunger P. Lubricant is conducted to the hollow pivotal rod 50 and conveyed to the duct 52 to and throughout the length of fibrous material in the arm. The sides of the arm are formed with an incline in reverse to the incline of the sides of the screw. A weight w, passing over a pulley w, is attached to the stud 50, so as to swing the arm 51 to the right upon its pivot, in which position it will be stopped by a screw-head 54. As the table rotates the screw 54 will force the arm 51 past and beneath the plunger P, lubricating the lower surface of the same, and when said screwhead has been so far moved as to release the end of the arm 51 said arm will be caused to return by reason of the weight w and again wipe the face of the plunger with the fibrous material, being stopped by the next succeeding screw-head 54.

n operation, save where we have herein pointed out differences in operation, the improved machine of this application acts, as does the machine of the prior patent, which operation, briefly stated,'consists in causing two feeding-hoppers H to admit a definitev quantity of material to two diametrically opposite molds in the mold-table, a connectingrod pawl mechanism then giving the table a partial turn to bring the two filled molds beneath thecompression-plungers P P, which approach the mass of material in the pair of oppositely-located molds. The pawl mechanism is again operated to move the table another step to bring said diametrically opposite molds beneath the ejectors, which are operated to eject the finished block from the mold, the pair of ejectors, the pair of feedinghoppers, and the pair of compression-cylinder plungers all acting simultaneously, each on a different pair of diametrically opposite molds.

In this application we have merely indicated feed-hoppers, valve means, compression cylinders and plungers, and the ejector mechanism, as such elements have all been fully shown and described in the patent above referred to. 1

Although we have shown a horizontal moldtable and a duplex arrangement of imple-v ments in thisapplication, we do not limit ourselves to such position and arrangement, as the table may occupy any position from horizontal to vertical and the number of im plements increased or diminished. We claim as our 1nvent1on 1. An apparatus for making blocks, comprising a mold-table, molds therein, compression-plungers adapted to enter the molds,

a lubricating-arm, and projections on the table to engage the arm and pass it over the face of the plungers when withdrawn from the mold.

prising a revoluble mold-table,molds therein, compression-plungers, a lubricating-arm adj acent to said table, pins on said table to engage, the arm, and a counterweight, said arm. adapted to pass against a plunger-face upon V 2. Apparatus for making blocks, com-;

oted to said table and traveling on said platform, and means for lubricating the roller.

5. Apparatus for making blocks, comprising a revoluble mold-table, molds there in, compression-plungers, a stationary platform beneath said revoluble table, a lubricating-tank in said stationary platform, and a roller ivoted to said table and traveling on said p atform.

6. Apparatus for making blocks, comprising a revoluble table, molds therein, compression-plungers, a stationary platform beneath said table, a lubricating-tank in said platform, and a lubricating-roller pivoted to.

said table and traveling on said stationary platform, in combination with a scraper also pivoted to said mold-table.

7. Apparatus for making blocks, comprising a revoluble table, molds therein, compression-plungers, a stationary platform beneath said table, a scraper pivoted on said table and adapted to have its edge come into contact withaplunger-face as it passes over it.

8. Apparatus for making blocks, comprising a revoluble mold-table, a continuous circular stationary platform beneath it, lubricating-tanks in said platform, compression-plungers, said platform having openings in line with said plungers, a lubricating-arm adapted to be passed against the surface of an upper plunger, and a roller adapted to be immersed in the tank and passed over the surface of a lower plunger.

9. Apparatus for making blocks, comprising a pair of cylinders and plungers, a moldtable, a separate returning-lever, piston and cylinder for each plunger, an open pipe from a common source of pressure to both such returning cylinders, and valved piping to the cylinders of the plungers.

10. Apparatus for making blocks, comprising a horizontal mold-table and vertical ejector means over the mold-table, a tank beneath said table adapted to contain fluid, the surface of the liquid being near to and parallel with the surface of the ejected block, so that the block falls directly and flat into the an.

11, Apparatus for making blocks, com.- prising a horizontal mold-table and vertical ejector means over the mold-table, a tank beneath said table adapted to contain fluid, the surface of the liquid being near to and parallel with the surface of the ejected block, so that the block drops directly and flat into the tank.

12. Apparatus for making blocks, comprising a revoluble mold-table, compressionplungers and an ejector over the said table, a tank beneath the table adapted to contain fluid, the surface of the liquid being near to and parallel with the surface of the ejected block, 80 that he block all d r t y n flat into the tank.

' 1,3. Molding apparatus, comprising a revoluble moldrtable, plungers and ejectors therefo a continuous platform beneath the same having openings in line with the plungers and ejectors, a tank below the table, a con veyer in the tank below its waterlevel, and

an unobstructed passage beneath the ejectors and between the water-level and the .under side of the platform.

14. Molding apparatus,comprising a frame, a revoluble mold-table, compressio n-pluners, a driving-shaft, a rod for intermitten-tly grasping the table at two different points to rotate it, and a cam for driving said rod and table at a gradually-increasing, then gradually-decreasing speed.

:15. Molding apparatus, .comprisinga frame, a revoluble mold-table, compression-plungers, a driving-shaft, a rod for intermittently grasping the table at two different points to rotate it, a cam for driving said rod and table at a variable speed, and for holding it substantially at rest, in combination with a locking means adapted to lock said table in its position of rest.

16. Molding apparatus, comprising a revoluble mold-table, notches in the periphery thereof, compressionplungers, a driving means for rotating said table, in combination with an auxiliary locking device for holding said table in a stationary position, said device comprising a shaft rotated through the driving means, and a cam on said shaft adapted to engage the notches in the periphery of the table.

' 17. Molding apparatus,comprising a frame,

'a revoluble mold-table, compression-plungers, a driving-shaft, a rod for intermittently grasping and rotating the table, a cam for driving said. rod and table at a variable speed, and for holding it substantially at rest, in combination with a notched outer edge to the table, and a rotating locking-arm adapt- 7,0 ed to register therewith in the position of rest of the table.

18. Mol ing apparatuspomprising a moldtable, cylinders and compression-.plungers, a rod for intermittently rotating the table, a 7 5 shaft having a locking-arm adapted to lock the table in its position of rest, cams on said shaft, a valve for controlling the pressure to the cylinders and levers to operate the same from said cams. 8o

19. A revoluble mold-table, molds therein, a stationary annular platform beneath, adjacent to the lower faces of the molds, and a frame having circumferential opening for said platform.

20. A revoluble mold-table, molds therein, a stationary annular platform beneatlnadja cent to the lower faces of the molds, and a frame having a circumferential opening ,on the outside and on the inside of said platform.

21. A revoluble mold-table, molds and tracks for the same, a stationary circular platform beneath the table of such dimension that a space will be left between the tracks and the stationary platform for the 5. escape of the loose material.

22. A revoluble mold-table, molds passing therothrough, tracks for the table on both sides of the molds, a stationary platform beneath aforesaid table adjacent to the molds roo lower faces, said table being of less width than the distance between the tracks.

23. A revoluble mold-table, molds therein,

a stationary platform beneath adjacent to the lower faces of the molds, the table being 10.5 so proportioned with relation to the platform as to leave a free circumferential opening around said platform, and adjustingscrcws passing through the frame for adjusting the position of the platform. I re 24. A revoluble mold table, trackways and molds, in combination with a stationary platform beneath aforesaid table, an ejector,- plunger and compression-plungers, openings in said stationary platform in line therewith, r 15 a feed-hopper, a lubricating-box in the platform between the ejector-opening and the feed-hopper.

25. A revoluble mold-table, trackways and molds, in combination with a stationary :20 platform beneath aforesaid table, an ejectorplunger and comprcssion-plungers, openings in said stationary platform in line therewith, a feed-hopper, and a lubricating-box in the platform between the ejector-opening and the feed-hopper, in combination with a lubricating device depending from the revoluble table, the sides of the opening adjacent to the compression-plungers being inclined.

26 A mold-table with a recessed periph- 1 0 ery and means for intermittently revolving it, an auxiliary locking means comprising a segmental arm and means for operating it fast and slow.

27. A revolving mold-table, molds therein, a stationary platform beneath and against which the molds pass, said stationary platform being composed of sections secured together, and a lubricating box opening to the upper surface of said platform, in combination with compression-plungers and lubricat termittently-revolvmg table, in combination with a bufier, adapted to be engaged by certain'points of said table when approaching its position of rest, said buffer consisting of a hydraulic cylinder and piston.

'31. A molding apparatus, having an intermittently-revolving table, in combination with a buffer, adapted to be engaged at certain points of said table, said buffer consisting of a hydraulic cylinder and piston, an

opening in the pistonhead, and a tapered plug secured to the cylinder and fitting with in said opening.

' 32. A molding apparatus, having an intermittently-revolving table, in combination with a buffer, adapted to be engaged at certain points of said table, said buffer consisting of a hydraulic cylinder and piston, and a throttle means for increasing the buffer ac. tion as the piston is advanced.

I 33. A revolving mold-table having circumferentially-arranged engaging means, a hydraulic cylinder and piston, a lever secured to the piston normally having one end adapted to be engaged by the engaging means, and a cam adapted to-throw the lever to disengage it from said means.

34-. A revolving mold-table having circumferentially-arranged engaging means, a hydraulic cylinder and piston, a lever secured to the piston normally having one end adapted to be engaged by the engaging means, and acam adapted to throw the lever to disengage it from said means, in combination with a tapered plug within the cylinder, passing through an opening in the piston-head, and a spring adapted to return said piston to normal position.

35. In combination with the mold-ejector of a machine for molding plastic articles, a conveyor beneath said ejector and mold and plates at the lower opening of the mold and depending intothe tank above the conveyer.

36. An apparatus for making blocks, comprising a movable mold-table, molds therein, compression means acting in said molds, a

roller carried by said table for lubricating' the compression means, and means for lubrieating the roller.

37. An apparatus for making blocks, cornprising a revoluble table, molds therein, compression means acting 1n said molds, a lubrieating-tank and a lubricating-roller carried by said table for lubricating the compression means, in combination with a scraper also carried by said table to act on the compression means. U

38. An apparatus for making blocks, comprising a revoluble table, molds therein, and

compression means acting in the molds, in

combination with a scraper carried by said table for scraping the compression means.

39. An apparatus for making blocks, comprising a horizontal mold-table and vertical e ector means over the mold-table for eject ing the blocks therefrom, a tank beneath said table adapted to contain a fluid, the surface of the liquid being near to and parallelwith the surface of the ejected block so that the block falls directly and flat into the tank.-

40. An apparatus for making blocks, comprising a mold-table, means for ejecting the finished blocks therefrom, and a platform supporting said table, in combination with a shield on the under side of the platform' through which the blocks pass.

In testimony whereof we have signed our names to this specification 1n the presence of two subscribing witnesses.

WVILLIALI S. GODWIN. CHARLES I. WILLIAMS. Witnesses: HUBERT HowsoN,

F. WARREN WRIGHT. 

